Hi to all,
I rebuild the mod_jk 1.2.28 on our i5/OS and Apache instance failed.
Here is the stack trace :
00000009:259448 Stack: Library / Program Module Stmt
Procedure
00000009:259488 Stack: QSYS / QCMD 455 :
00000009:259520 Stack: QHTTPSVR / QZHBMAIN ZHBMAIN 0 :
_CXX_PEP__Fv
00000009:259552 Stack: QHTTPSVR / QZHBMAIN ZHBMAIN 18 :
main
00000009:259576 Stack: QHTTPSVR / QZHBMAIN ZHBMAIN 234 :
BigSwitch__FiPPc
00000009:259608 Stack: QHTTPSVR / QZSRHTTP QZSRMAIN 0 :
_CXX_PEP__Fv
00000009:259640 Stack: QHTTPSVR / QZSRHTTP QZSRMAIN 2 :
main
00000009:267440 Stack: QHTTPSVR / QZSRCORE MAIN 868 :
apache_main
00000009:287992 Stack: QHTTPSVR / QZSRCORE HTTP_CONFI 5 :
ap_run_post_config
00000009:288288 Stack: QHTTPSVR / MOD_JK1228 MOD_JK 60 :
jk_post_config
00000009:288320 Stack: QHTTPSVR / MOD_JK1228 MOD_JK 35 :
init_jk
00000009:288688 Stack: QHTTPSVR / MOD_JK1228 JK_WORKER 34 :
wc_open
00000009:288720 Stack: QHTTPSVR / MOD_JK1228 JK_WORKER 9 :
build_worker_map
00000009:296848 Stack: QHTTPSVR / MOD_JK1228 JK_WORKER 28 :
wc_create_worker
00000009:298192 Stack: QHTTPSVR / MOD_JK1228 JK_AJP13_W 5 :
validate
00000009:298208 Stack: QHTTPSVR / MOD_JK1228 JK_AJP_COM 29 :
ajp_validate
00000009:298216 Stack: QHTTPSVR / MOD_JK1228 JK_CONNECT 19 :
jk_resolve
00000009:316840 Stack: QHTTPSVR / QZSRAPR APR_POOLS 13 :
apr_pool_clear
00000009:316864 Stack: QHTTPSVR / QZSRAPR APR_POOLS 8 :
allocator_free
00000009:316880 Stack: QHTTPSVR / QZSRCORE MAIN 18 :
Main_Excp_Handler
00000009:316888 Stack: QHTTPSVR / QZSRAPR OS400TRACE 7 :
apr_dstack_CCSID
00000009:326912 Stack: QSYS / QP0ZCPA QP0ZUDBG 3 :
Qp0zDumpStack
00000009:346808 Stack: QSYS / QP0ZSCPA QP0ZSDBG 2 :
Qp0zSUDumpStack
00000009:346824 Stack: QSYS / QP0ZSCPA QP0ZSDBG 12 :
Qp0zSUDumpTargetStack
00000009:346824 Stack: Completed
00000009:407280 apr_dump_trace(): dump for job
678302/QTMHHTTP/DAPSERVER
TRCTCPAPP Output
The problem appears in jk_resolve just after apr_pool_create.
What happen if 2 threads goes in jk_resolve at the same time ?
if (!jk_apr_pool) {
if (apr_pool_create(&jk_apr_pool, (apr_pool_t *)pool) !=
APR_SUCCESS) {
JK_TRACE_EXIT(l);
return JK_FALSE;
}
}
apr_pool_clear(jk_apr_pool);
if (apr_sockaddr_info_get
(&remote_sa, host, APR_UNSPEC, (apr_port_t) port, 0, jk_apr_pool)
!= APR_SUCCESS) {
JK_TRACE_EXIT(l);
return JK_FALSE;
}
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